That is so neat your chickens found that for you.. I have had a sort of similuar thing happen.. Hope this isnt thread stealing, telling my little tale about my experiance..
I had a yard sale about 7 1/2 years ago. And after it was all over. I was walking in our drive way. And I found a ring. No one ever listed it as missing. No one claimed it.. Finally in 2008 we took it to a jewlry store to see if it was real or not. I had a feeling it might be diamonds. Because the stones were set to where the back was left open. We thought it was silver or white gold. Come to find out. They are diamonds. And the ring is made of platnium.. And it was made in the 30s or 40s. So it is old. Slightly damaged, from getting ran over. I didnt have money to get it appraised. But they told me not to do any thing with it. Like dont fix it until it is appraised. I was thinking about using the stones for a necklace. They said, No dont do that. So I am thinking it may be worth a bit. Hope so. But still dont have any money to appraise it though..
Edited: My spelling is awful..